public class Calculadora {

	public double multiplicar (double a, double b)
	{
		return a*b;
	}
	public double dividir (double a, double b)
	{
		if (b == 0) {
			return 1000000000000000000000.0; // a VERY big number
		}
		return a/b;
	}
	public double sumar (double a, double b) {
		return a + b;
	}
	
	public double restar (double a, double b) {
		return a - b;
	}
}
